Tactics for Cellphone Tracking

Thursday , 14, November 2013 Leave a comment

Technology Engineered for Emergency Response Are Available for Tracking Your Children. Cell tracking, cell phone GPS and mobile phone tracking tools are really drawing attention from individuals, cell phone businesses and software makers. The latest mobile phones have GPS position functionality to track phone position.
 Mobile Tracking
GPS receivers, no matter if inside a phone, or simply a dedicated Portable gps tracking device, determine specific location by precisely timing the signals passed on by GPS satellites. This data comes with the time the message was transmitted, precise orbital details (formally referred to as the ephemeris), as well as the general system status and estimated orbits of all GPS satellites (technically referred to as the almanac). GPS receivers sometimes take a long time to become ready to use after being turned on because it must acquire some basic information in addition to capturing GPS satellite signals. This slow start can be caused if the GPS mobile phone has been unused for days or weeks, or has been transported a significant distance while unused for. The GPS must update its almanac and ephemeris data and store it in memory. The GPS almanac is a set of data that every GPS satellite transmits. When a GPS receiver has current almanac data in memory, it can capture satellite signals and find initial position more quickly.
GPS Hot Start is the term for when the GPS enabled handset remembers its last identified position, the satellites that had been in range at the time, and also the almanac data in memory, and attempts to find the same satellites and determine a new position based upon the previous information. This is almost always the quickest GPS lock but Hot Start only works if the phone is in the same general area as when the GPS was last switched off. GPS Warm Start refers to whenever the GPS enabled device remembers its last known location, and almanac used, but not which satellites were in view. It performs a reset and attempts to find satellite signals and computes a brand new location. The GPS receiver narrows the choice of which satellites tolook for since it saved its last known position and also the almanac data helps determine which satellites are within view. The Warm Start is going to take more time than the Hot Start although not as long as a Cold Start. With GPS Cold Start, the device deletes all the previous information, and tries to locate satellites and attain a GPS lock. This will take more time since there is no known reference information. The GPS enabled handset receiver has to try to lock onto a satellite signal from any accessible satellites.
To be able to get improved GPS lock times cellphone manufacturers and network operators introduced Assisted GPS technology. This downloads the ephemeris helping triangulate the mobile phone basic position. GPS Receivers can get a faster lock in return for a few kilobytes of data transmission. Assisted GPS, also called A-GPS or AGPS, increases the performance of standard GPS in smartphones connected to the cell network. In the United States Sprint, Nextel, Verizon Wireless, and Alltel all use Assisted GPS. Which is a method of using the cell network to accelerate finding of GPS satellites.
A-GPS assists location tracking performance of cell phones (and other connected devices) in two ways:
One method will be assisting to secure a more rapid “time to first fix” (TTFF). AGPS receives and stores data in relation to satellite location utilizing the cell network and so the location data does not need to be downloaded from the the satellite.
The second way is by helping locate mobile phones when GPS signals are weak or blocked. Since GPS satellite signals may be impeded by tall structures, and do not go through building interiors well Assisted GPS makes use of distance to cellular towers to approximate position when GPS signals are not accessible.
If satellite signals are not readily available, or precision is less important than life of the battery, applying Cell-ID is a good substitute to GPS cell phone location. The position of the handset might be estimated by the cellular network cell id, that determines the cell tower the phone is connected to. By understanding the location of the tower, you’ll be able to know approximately the location where the handset is. Still, a tower can cover a large area, from a few hundred meters, in high populationdensity regions, to several kilometers in lower density areas. This is why location CellID precision is lower than GPS accuracy. Nonetheless location from CellID still provides quite a helpful alternative.
Another method of formulating cell phone location is Triangulation or Mobile Location Services (MLS). Cell Tower Triangulation makes use of signal analysis data to determine the time it takes signals to travel from your cellphone to no less than 3 cell towers to calculate position.